Quote: Would a 50/50 mix of vinegar and water neutralize the acids? That's what it takes to neutralize metal after a soda blast.
Or acetone/Eastwood Pre?
I don't think baking soda and water would work if the surface was going to be primed or painted. Baking soda residue won't let the primer stick to the surface. At least that's the case with soda blasting - all the soda must be neutralized.
baking soda is a base, it will neutralize acids
vinegar is an acid, it will neutralize bases.
mix the 2 together and you have the standard, 3rd grade "volcano" science project.
bases can be just as corrosive as acids, such as the caustic soda that gets used in hot tanks to clean parts.
so, baking soda sand blasting that embeds soda into the metal...needs an acid to neutralize and remove for paint.
the rust remover above us using 2 acids and a salt...salts are chemically stable and I'm surprised if it is actually helping remove the rust in this case, but the 2 acids--vinegar and lemon juice, will need to be thoroughly washed away or neutralized prior to painting
